Title, Appunti di informatica libera. Author, Daniele Giacomini. Publisher, Systems Comunicazioni, ISBN, , Length, Appunti di informatica libera by Daniele Giacomini at – ISBN – ISBN – Systems Comunicazioni – Softcover. which makes available automatically a swap file for the virtual memory. Appunti di informatica libera Copyright © Daniele Giacomini.

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Free Book: appunti di informatica libera

Semi-free software is software that allow usage, copy, modification and distribution even after a modification for whatever reason except to make profit out of it. The word copyleft is an invention and represents the copyright of who, while defending his rights as the author, wants to defend freedom of his work, imposing that the original version of his work and derivated ones are kept free.

Shortly, a license belonging to the “copyleft” category blocks additional restrictions applied to it from who is going to redistribute the software modified or libwra whatever at the moment. However, it is important not to do that while you are working with MS-Windows: Paying does not mean “purchasing” the software, but just dealing with it according to what is written in the license.

Appunti di informatica libera

Even if this concept doesn’t create any problem liber software usage, it is not convenient to adopt this license if you don’t have such a need. One of the basic elements of free software is the possibility to sell original or modified copies to make profit out of it.

This owner can be the original author or maybe another holder which has gained the rights with a contract. Trying to avoid this little disadvantage different modified versions of this license have been created.

«a2», ex «Appunti di informatica libera», ex «Appunti Linux»

The original Artistic license is by most people considered a bad formulated license, too vague and thus not good for preserving software freedom.

Under this perspective it is not included in the free software category. Also this time, it is worth listing some definitions for non-free software. The holder of the copyright becomes the owner of the work. Software is not free when all the minimal requisites to classify it as such are not satisfied. Some people prefer to use the “Open Source” tag to identify free software in the terms we have described above.


Appunti di informatica libera Use of the software can be granted for free or upon a payment. With the shareware word we refer to proprietary software that you are required to buy after a trial period even if it can be freely distributed.

Usually, the contract that rules the use of software is the license ; is always important to know deeply the terms of the license agreement for the software you intend to deal with. On its own this software it’s free, but since it has no copyright it doesn’t have a license either, so anybody is free to do whatever he wants with it, even take ownership of the rights. To put a remedy in the holes of the Artistic license, a new revision called Clarified Artistic License was developed.

This way, the patent doesn’t allow the use of the algorithm or protected idea without an explicit authorisation from the owner of the copyright. Freedom 3, freedom to improve the program and to distribute such improvements also for this one we need the source code. Software which can not be sold, even though satisfying the four basic concepts listed here is not going be considered free software in this written work.

ZIP [ Enter ]. Nature of the software is comprised of two different parts: In many countries you may also be able to patent algorithms and other concepts tied to software. This is a detail that must not be forget.

The first one is human readable, while the second one is suited for machine execution and not for reading. To better understand or mess up things as well, we can add that both non-free and non-commercial software do exist.

Free software is not necessarily copylefted and this happens ddi the license does not explicitly forbid applying additional restrictions from who redistribute the software.

The original BSD license contains an explicit reference to the Berkeley university and explicitly states that the name cannot be used for advertising. It is possible to install addtional software, by using the normal packages of the Slackware distribution. The freeware word is not tied to a strict definition, but usually refers to software that is freely available but doesn’t come along with the source.

Following the same path, laws in these countries tend to put an illicit mark over reverse engineering of the software. However there are netconfig to configure the network interface and pppconfig to configure a PPP connection over a switched line. The result should be a C: This means some copies or variations of this software are no more free.


Appunti di informatica libera

Following this subtle difference it is important to spot out the difference of proprietary software from commercial software because they’re not the same thing. EXE and similar disks cannot use its full performance potential;, just to avoid security problems.

Software always has an owner, except for public domain software which is covered later in this bookxppunti is such because he “owns the copyright “.

Freedom 1, freedom to study and learn how the program operates and the ability to modify it to best suit your own needs in such a case source code is needed. Public domain software is software without copyright. According to the various classifications explained in this chapter, commercial software is such, only because it’s sold for profit.

Free software can be such only if it’s offered along with source code. Since only the executable part is needed to make software operate, software copyright preservation laws that exist in many countries do permit distribution of the executable code alone, allowing the copyright owner to keep the source code hidden. You need to have a program to extract ZIP archives under Dos. Actually, you should observe what appears as: It’s a good thing to remember that price is not a thing that limits freedom and that other details are much more important.

The ZipSlack distribution is just a part of the normal Libdra distribution. The reason is that this kind of installation is not very efficient and presents risks: If you prefer, you could even install ZipSlack in another Dos device; the important thing is that the extration should always done in a root directory of that device. The latter is the study of the appuntl code geared towards learning how code operates.

In other words we could say that is free software with a limitation on usage and distribution for profit. It can be copied and used llibera not modified. This can be done by using the installpkg script, in the same way used for the normal Slackware distribution. To this extent someone said: